Title:
QUANTUM DOT, PREPARATION METHOD THEREOF AND QUANTUM DOT LIGHT-EMITTING DIODE
Document Type and Number:
WIPO Patent Application WO/2021/136002
Kind Code:
A1
Abstract:
Provided are a quantum dot, a preparation method thereof and a quantum dot light-emitting diode. The quantum dot comprises: a Cd XZn 1-XSe quantum dot core, wherein X gradually decreases along the radial direction of the Cd XZn 1-XSe quantum dot core from the inside to the outside, wherein 0＜X＜1; a first shell formed on the surface of the Cd XZn 1-XSe quantum dot core; a second shell formed on the surface of the first shell on the side away from the Cd XZn 1-XSe quantum dot core. The present disclosure provides a quantum dot with a gradient alloy structure, wherein, the Cd XZn 1-XSe quantum dot core is an alloy whose composition varies gradiently, the CdSe composition is dominant in the inner core, the ZnSe composition is dominant in the outer core, the energy level of the Cd XZn 1-XSe quantum dot core is continuous and widens outwards since the forbidden band width of CdSe is smaller than ZnSe. This structure is more conducive to charge transfer and recombination luminescence, thereby improving the performance of the blue quantum dot light-emitting diode device.
Inventors:
SUN PEICHUAN (CN)
YANG YIXING (CN)
YANG YIXING (CN)
Application Number:
PCT/CN2020/138003
Publication Date:
July 08, 2021
Filing Date:
December 21, 2020
Export Citation:
Assignee:
TCL TECH GROUP CORP (CN)
International Classes:
C09K11/02; C09K11/54; C09K11/56; H01L51/50
Foreign References:
| CN109020851A | 2018-12-18 | |||
| CN109694705A | 2019-04-30 | |||
| CN105322098A | 2016-02-10 | |||
| CN107573924A | 2018-01-12 |
Other References:
FITZMORRIS BOB C., PU YING-CHIH, COOPER JASON K., LIN YI-FANG, HSU YUNG-JUNG, LI YAT, ZHANG JIN Z.: "Optical Properties and Exciton Dynamics of Alloyed Core/Shell/Shell Cd 1– x Zn x Se/ZnSe/ZnS Quantum Dots", APPLIED MATERIALS & INTERFACES, AMERICAN CHEMICAL SOCIETY, US, vol. 5, no. 8, 24 April 2013 (2013-04-24), US, pages 2893 - 2900, XP055825485, ISSN: 1944-8244, DOI: 10.1021/am303149r
Attorney, Agent or Firm:
JOHNSON INTELLECTUAL PROPERTY AGENCY(SHENZHEN) (CN)
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